package cn.fj.hrm.config;

import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.*;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import javax.annotation.Resource;

@Configuration
@EnableCaching
    public class CacheConfig extends CachingConfigurerSupport {

        @Resource
        private RedisConnectionFactory factory;

        /**
         * 自定义生成redis-key ， 类名.方法名
         * @return
         */
        @Override
        @Bean
        public KeyGenerator keyGenerator() {
            return (o, method, objects) -> {
                StringBuilder sb = new StringBuilder();
                sb.append(o.getClass().getName()).append(".");
                sb.append(method.getName()).append(".");
                for (Object obj : objects) {
                    sb.append(obj.toString());
                }
                return sb.toString();
            };
        }

        //使用JSON进行序列化
        @Bean
        public RedisTemplate<String, Object> redisTemplate() {
            RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
            redisTemplate.setConnectionFactory(factory);
            //JSON格式序列化
            GenericJackson2JsonRedisSerializer genericJackson2JsonRedisSerializer = new GenericJackson2JsonRedisSerializer();
            //key的序列化
            redisTemplate.setKeySerializer(new StringRedisSerializer() );
            //value的序列化
            redisTemplate.setValueSerializer(genericJackson2JsonRedisSerializer);
            //hash结构key的虚拟化
            redisTemplate.setHashKeySerializer(new StringRedisSerializer());
            //hash结构value的虚拟化
            redisTemplate.setHashValueSerializer(genericJackson2JsonRedisSerializer);
            return redisTemplate;
        }

        @Bean
        @Override
        public CacheResolver cacheResolver() {
            return new SimpleCacheResolver(cacheManager());
        }

        @Bean
        @Override
        public CacheErrorHandler errorHandler() {
            // 用于捕获从Cache中进行CRUD时的异常的回调处理器。
            return new SimpleCacheErrorHandler();
        }
        //缓存管理器
        @Bean
        @Override
        public CacheManager cacheManager() {
            RedisCacheConfiguration cacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
                    .disableCachingNullValues() //不允许空值
                    .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));//值使用JSON虚拟化
            return RedisCacheManager.builder(factory).cacheDefaults(cacheConfiguration).build();

    }
}
